WASHINGTON - XM Satellite Radio ended the third quarter of 2005 with just over five million customers, doubling the 2.5 million it reported at the end of last year’s third quarter. The growth was driven by third quarter net subscriber additions of 617,152, a 48% increase over the 415,671 net subscribers added in the third quarter 2004. XM figures it will top six million subs before the end of this year. However, losses are still huge at the largest satellite radio company. XM's net loss for the third quarter 2005 was $131.9 million a 12% increase over Q3 2004. XM...